Cita APA (7a ed.)

Maull, H. W. (1980). Europe and world energy. Butterworths.

Cita Chicago Style (17a ed.)

Maull, Hanns W.. Europe and World Energy. London ; Boston: Butterworths, 1980.

Cita MLA (9a ed.)

Maull, Hanns W.. Europe and World Energy. Butterworths, 1980.